1 /* gerdes_amd7930.c,v 0.99 2001/10/02
2 *
3 * gerdes_amd7930.c Amd 79C30A and 79C32A specific routines
4 * (based on HiSax driver by Karsten Keil)
5 *
6 * Author Christoph Ersfeld <info@formula-n.de>
7 * Formula-n Europe AG (www.formula-n.com)
8 * previously Gerdes AG
9 *
10 *
11 * This file is (c) under GNU PUBLIC LICENSE
12 *
13 *
14 * Notes:
15 * Version 0.99 is the first release of this driver and there are
16 * certainly a few bugs.
17 *
18 * Please don't report any malfunction to me without sending
19 * (compressed) debug-logs.
20 * It would be nearly impossible to retrace it.
21 *
22 * Log D-channel-processing as follows:
23 *
24 * 1. Load hisax with card-specific parameters, this example ist for
25 * Formula-n enter:now ISDN PCI and compatible
26 * (f.e. Gerdes Power ISDN PCI)
27 *
28 * modprobe hisax type=41 protocol=2 id=gerdes
29 *
30 * if you chose an other value for id, you need to modify the
31 * code below, too.
32 *
33 * 2. set debug-level
34 *
35 * hisaxctrl gerdes 1 0x3ff
36 * hisaxctrl gerdes 11 0x4f
37 * cat /dev/isdnctrl >> ~/log &
38 *
39 * Please take also a look into /var/log/messages if there is
40 * anything importand concerning HISAX.
41 *
42 *
43 * Credits:
44 * Programming the driver for Formula-n enter:now ISDN PCI and
45 * necessary this driver for the used Amd 7930 D-channel-controller
46 * was spnsored by Formula-n Europe AG.
47 * Thanks to Karsten Keil and Petr Novak, who gave me support in
48 * Hisax-specific questions.
49 * I want so say special thanks to Carl-Friedrich Braun, who had to
50 * answer a lot of questions about generally ISDN and about handling
51 * of the Amd-Chip.
52 *
53 */
54
55
56 #include "hisax.h"
57 #include "isdnl1.h"
58 #include "isac.h"
59 #include "amd7930_fn.h"
60 #include <linux/interrupt.h>
61 #include <linux/init.h>
62 #include <linux/gfp.h>
63
64 static void Amd7930_new_ph(struct IsdnCardState *cs);
65
66 static WORD initAMD[] = {
67 0x0100,
68
69 0x00A5, 3, 0x01, 0x40, 0x58, // LPR, LMR1, LMR2
70 0x0086, 1, 0x0B, // DMR1 (D-Buffer TH-Interrupts on)
71 0x0087, 1, 0xFF, // DMR2
72 0x0092, 1, 0x03, // EFCR (extended mode d-channel-fifo on)
73 0x0090, 4, 0xFE, 0xFF, 0x02, 0x0F, // FRAR4, SRAR4, DMR3, DMR4 (address recognition )
74 0x0084, 2, 0x80, 0x00, // DRLR
75 0x00C0, 1, 0x47, // PPCR1
76 0x00C8, 1, 0x01, // PPCR2
77
78 0x0102,
79 0x0107,
80 0x01A1, 1,
81 0x0121, 1,
82 0x0189, 2,
83
84 0x0045, 4, 0x61, 0x72, 0x00, 0x00, // MCR1, MCR2, MCR3, MCR4
85 0x0063, 2, 0x08, 0x08, // GX
86 0x0064, 2, 0x08, 0x08, // GR
87 0x0065, 2, 0x99, 0x00, // GER
88 0x0066, 2, 0x7C, 0x8B, // STG
89 0x0067, 2, 0x00, 0x00, // FTGR1, FTGR2
90 0x0068, 2, 0x20, 0x20, // ATGR1, ATGR2
91 0x0069, 1, 0x4F, // MMR1
92 0x006A, 1, 0x00, // MMR2
93 0x006C, 1, 0x40, // MMR3
94 0x0021, 1, 0x02, // INIT
95 0x00A3, 1, 0x40, // LMR1
96
97 0xFFFF
98 };
99
100
101 static void /* macro wWordAMD */
WriteWordAmd7930(struct IsdnCardState * cs,BYTE reg,WORD val)102 WriteWordAmd7930(struct IsdnCardState *cs, BYTE reg, WORD val)
103 {
104 wByteAMD(cs, 0x00, reg);
105 wByteAMD(cs, 0x01, LOBYTE(val));
106 wByteAMD(cs, 0x01, HIBYTE(val));
107 }
108
109 static WORD /* macro rWordAMD */
ReadWordAmd7930(struct IsdnCardState * cs,BYTE reg)110 ReadWordAmd7930(struct IsdnCardState *cs, BYTE reg)
111 {
112 WORD res;
113 /* direct access register */
114 if (reg < 8) {
115 res = rByteAMD(cs, reg);
116 res += 256 * rByteAMD(cs, reg);
117 }
118 /* indirect access register */
119 else {
120 wByteAMD(cs, 0x00, reg);
121 res = rByteAMD(cs, 0x01);
122 res += 256 * rByteAMD(cs, 0x01);
123 }
124 return (res);
125 }
126
127
128 static void
Amd7930_ph_command(struct IsdnCardState * cs,u_char command,char * s)129 Amd7930_ph_command(struct IsdnCardState *cs, u_char command, char *s)
130 {
131 if (cs->debug & L1_DEB_ISAC)
132 debugl1(cs, "AMD7930: %s: ph_command 0x%02X", s, command);
133
134 cs->dc.amd7930.lmr1 = command;
135 wByteAMD(cs, 0xA3, command);
136 }
137
138
139
140 static BYTE i430States[] = {
141 // to reset F3 F4 F5 F6 F7 F8 AR from
142 0x01, 0x02, 0x00, 0x00, 0x00, 0x07, 0x05, 0x00, // init
143 0x01, 0x02, 0x00, 0x00, 0x00, 0x07, 0x05, 0x00, // reset
144 0x01, 0x02, 0x00, 0x00, 0x00, 0x09, 0x05, 0x04, // F3
145 0x01, 0x02, 0x00, 0x00, 0x1B, 0x00, 0x00, 0x00, // F4
146 0x01, 0x02, 0x00, 0x00, 0x1B, 0x00, 0x00, 0x00, // F5
147 0x01, 0x03, 0x00, 0x00, 0x00, 0x06, 0x05, 0x00, // F6
148 0x11, 0x13, 0x00, 0x00, 0x1B, 0x00, 0x15, 0x00, // F7
149 0x01, 0x03, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, // F8
150 0x01, 0x03, 0x00, 0x00, 0x00, 0x09, 0x00, 0x0A}; // AR
151
152
153 /* Row init - reset F3 F4 F5 F6 F7 F8 AR */
154 static BYTE stateHelper[] = { 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
155
156
157
158
159 static void
Amd7930_get_state(struct IsdnCardState * cs)160 Amd7930_get_state(struct IsdnCardState *cs) {
161 BYTE lsr = rByteAMD(cs, 0xA1);
162 cs->dc.amd7930.ph_state = (lsr & 0x7) + 2;
163 Amd7930_new_ph(cs);
164 }
165
166
167
168 static void
Amd7930_new_ph(struct IsdnCardState * cs)169 Amd7930_new_ph(struct IsdnCardState *cs)
170 {
171 u_char index = stateHelper[cs->dc.amd7930.old_state] * 8 + stateHelper[cs->dc.amd7930.ph_state] - 1;
172 u_char message = i430States[index];
173
174 if (cs->debug & L1_DEB_ISAC)
175 debugl1(cs, "AMD7930: new_ph %d, old_ph %d, message %d, index %d",
176 cs->dc.amd7930.ph_state, cs->dc.amd7930.old_state, message & 0x0f, index);
177
178 cs->dc.amd7930.old_state = cs->dc.amd7930.ph_state;
179
180 /* abort transmit if nessesary */
181 if ((message & 0xf0) && (cs->tx_skb)) {
182 wByteAMD(cs, 0x21, 0xC2);
183 wByteAMD(cs, 0x21, 0x02);
184 }
185
186 switch (message & 0x0f) {
187
188 case (1):
189 l1_msg(cs, HW_RESET | INDICATION, NULL);
190 Amd7930_get_state(cs);
191 break;
192 case (2): /* init, Card starts in F3 */
193 l1_msg(cs, HW_DEACTIVATE | CONFIRM, NULL);
194 break;
195 case (3):
196 l1_msg(cs, HW_DEACTIVATE | INDICATION, NULL);
197 break;
198 case (4):
199 l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
200 Amd7930_ph_command(cs, 0x50, "HW_ENABLE REQUEST");
201 break;
202 case (5):
203 l1_msg(cs, HW_RSYNC | INDICATION, NULL);
204 break;
205 case (6):
206 l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
207 break;
208 case (7): /* init, Card starts in F7 */
209 l1_msg(cs, HW_RSYNC | INDICATION, NULL);
210 l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
211 break;
212 case (8):
213 l1_msg(cs, HW_POWERUP | CONFIRM, NULL);
214 /* fall through */
215 case (9):
216 Amd7930_ph_command(cs, 0x40, "HW_ENABLE REQ cleared if set");
217 l1_msg(cs, HW_RSYNC | INDICATION, NULL);
218 l1_msg(cs, HW_INFO2 | INDICATION, NULL);
219 l1_msg(cs, HW_INFO4_P8 | INDICATION, NULL);
220 break;
221 case (10):
222 Amd7930_ph_command(cs, 0x40, "T3 expired, HW_ENABLE REQ cleared");
223 cs->dc.amd7930.old_state = 3;
224 break;
225 case (11):
226 l1_msg(cs, HW_INFO2 | INDICATION, NULL);
227 break;
228 default:
229 break;
230 }
231 }
232
233
234
235 static void
Amd7930_bh(struct work_struct * work)236 Amd7930_bh(struct work_struct *work)
237 {
238 struct IsdnCardState *cs =
239 container_of(work, struct IsdnCardState, tqueue);
240 struct PStack *stptr;
241
242 if (test_and_clear_bit(D_CLEARBUSY, &cs->event)) {
243 if (cs->debug)
244 debugl1(cs, "Amd7930: bh, D-Channel Busy cleared");
245 stptr = cs->stlist;
246 while (stptr != NULL) {
247 stptr->l1.l1l2(stptr, PH_PAUSE | CONFIRM, NULL);
248 stptr = stptr->next;
249 }
250 }
251 if (test_and_clear_bit(D_L1STATECHANGE, &cs->event)) {
252 if (cs->debug & L1_DEB_ISAC)
253 debugl1(cs, "AMD7930: bh, D_L1STATECHANGE");
254 Amd7930_new_ph(cs);
255 }
256
257 if (test_and_clear_bit(D_RCVBUFREADY, &cs->event)) {
258 if (cs->debug & L1_DEB_ISAC)
259 debugl1(cs, "AMD7930: bh, D_RCVBUFREADY");
260 DChannel_proc_rcv(cs);
261 }
262
263 if (test_and_clear_bit(D_XMTBUFREADY, &cs->event)) {
264 if (cs->debug & L1_DEB_ISAC)
265 debugl1(cs, "AMD7930: bh, D_XMTBUFREADY");
266 DChannel_proc_xmt(cs);
267 }
268 }
269
270 static void
Amd7930_empty_Dfifo(struct IsdnCardState * cs,int flag)271 Amd7930_empty_Dfifo(struct IsdnCardState *cs, int flag)
272 {
273
274 BYTE stat, der;
275 BYTE *ptr;
276 struct sk_buff *skb;
277
278
279 if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
280 debugl1(cs, "Amd7930: empty_Dfifo");
281
282
283 ptr = cs->rcvbuf + cs->rcvidx;
284
285 /* AMD interrupts off */
286 AmdIrqOff(cs);
287
288 /* read D-Channel-Fifo*/
289 stat = rByteAMD(cs, 0x07); // DSR2
290
291 /* while Data in Fifo ... */
292 while ((stat & 2) && ((ptr-cs->rcvbuf) < MAX_DFRAME_LEN_L1)) {
293 *ptr = rByteAMD(cs, 0x04); // DCRB
294 ptr++;
295 stat = rByteAMD(cs, 0x07); // DSR2
296 cs->rcvidx = ptr - cs->rcvbuf;
297
298 /* Paket ready? */
299 if (stat & 1) {
300
301 der = rWordAMD(cs, 0x03);
302
303 /* no errors, packet ok */
304 if (!der && !flag) {
305 rWordAMD(cs, 0x89); // clear DRCR
306
307 if ((cs->rcvidx) > 0) {
308 if (!(skb = alloc_skb(cs->rcvidx, GFP_ATOMIC)))
309 printk(KERN_WARNING "HiSax: Amd7930: empty_Dfifo, D receive out of memory!\n");
310 else {
311 /* Debugging */
312 if (cs->debug & L1_DEB_ISAC_FIFO) {
313 char *t = cs->dlog;
314
315 t += sprintf(t, "Amd7930: empty_Dfifo cnt: %d |", cs->rcvidx);
316 QuickHex(t, cs->rcvbuf, cs->rcvidx);
317 debugl1(cs, "%s", cs->dlog);
318 }
319 /* moves received data in sk-buffer */
320 skb_put_data(skb, cs->rcvbuf,
321 cs->rcvidx);
322 skb_queue_tail(&cs->rq, skb);
323 }
324 }
325
326 }
327 /* throw damaged packets away, reset receive-buffer, indicate RX */
328 ptr = cs->rcvbuf;
329 cs->rcvidx = 0;
330 schedule_event(cs, D_RCVBUFREADY);
331 }
332 }
333 /* Packet to long, overflow */
334 if (cs->rcvidx >= MAX_DFRAME_LEN_L1) {
335 if (cs->debug & L1_DEB_WARN)
336 debugl1(cs, "AMD7930: empty_Dfifo L2-Framelength overrun");
337 cs->rcvidx = 0;
338 return;
339 }
340 /* AMD interrupts on */
341 AmdIrqOn(cs);
342 }
343
344
345 static void
Amd7930_fill_Dfifo(struct IsdnCardState * cs)346 Amd7930_fill_Dfifo(struct IsdnCardState *cs)
347 {
348
349 WORD dtcrr, dtcrw, len, count;
350 BYTE txstat, dmr3;
351 BYTE *ptr, *deb_ptr;
352
353 if ((cs->debug & L1_DEB_ISAC) && !(cs->debug & L1_DEB_ISAC_FIFO))
354 debugl1(cs, "Amd7930: fill_Dfifo");
355
356 if ((!cs->tx_skb) || (cs->tx_skb->len <= 0))
357 return;
358
359 dtcrw = 0;
360 if (!cs->dc.amd7930.tx_xmtlen)
361 /* new Frame */
362 len = dtcrw = cs->tx_skb->len;
363 /* continue frame */
364 else len = cs->dc.amd7930.tx_xmtlen;
365
366
367 /* AMD interrupts off */
368 AmdIrqOff(cs);
369
370 deb_ptr = ptr = cs->tx_skb->data;
371
372 /* while free place in tx-fifo available and data in sk-buffer */
373 txstat = 0x10;
374 while ((txstat & 0x10) && (cs->tx_cnt < len)) {
375 wByteAMD(cs, 0x04, *ptr);
376 ptr++;
377 cs->tx_cnt++;
378 txstat = rByteAMD(cs, 0x07);
379 }
380 count = ptr - cs->tx_skb->data;
381 skb_pull(cs->tx_skb, count);
382
383
384 dtcrr = rWordAMD(cs, 0x85); // DTCR
385 dmr3 = rByteAMD(cs, 0x8E);
386
387 if (cs->debug & L1_DEB_ISAC) {
388 debugl1(cs, "Amd7930: fill_Dfifo, DMR3: 0x%02X, DTCR read: 0x%04X write: 0x%02X 0x%02X", dmr3, dtcrr, LOBYTE(dtcrw), HIBYTE(dtcrw));
389 }
390
391 /* writeing of dtcrw starts transmit */
392 if (!cs->dc.amd7930.tx_xmtlen) {
393 wWordAMD(cs, 0x85, dtcrw);
394 cs->dc.amd7930.tx_xmtlen = dtcrw;
395 }
396
397 if (test_and_set_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
398 debugl1(cs, "Amd7930: fill_Dfifo dbusytimer running");
399 del_timer(&cs->dbusytimer);
400 }
401 init_timer(&cs->dbusytimer);
402 cs->dbusytimer.expires = jiffies + ((DBUSY_TIMER_VALUE * HZ) / 1000);
403 add_timer(&cs->dbusytimer);
404
405 if (cs->debug & L1_DEB_ISAC_FIFO) {
406 char *t = cs->dlog;
407
408 t += sprintf(t, "Amd7930: fill_Dfifo cnt: %d |", count);
409 QuickHex(t, deb_ptr, count);
410 debugl1(cs, "%s", cs->dlog);
411 }
412 /* AMD interrupts on */
413 AmdIrqOn(cs);
414 }
415
416
Amd7930_interrupt(struct IsdnCardState * cs,BYTE irflags)417 void Amd7930_interrupt(struct IsdnCardState *cs, BYTE irflags)
418 {
419 BYTE dsr1, dsr2, lsr;
420 WORD der;
421
422 while (irflags)
423 {
424
425 dsr1 = rByteAMD(cs, 0x02);
426 der = rWordAMD(cs, 0x03);
427 dsr2 = rByteAMD(cs, 0x07);
428 lsr = rByteAMD(cs, 0xA1);
429
430 if (cs->debug & L1_DEB_ISAC)
431 debugl1(cs, "Amd7930: interrupt: flags: 0x%02X, DSR1: 0x%02X, DSR2: 0x%02X, LSR: 0x%02X, DER=0x%04X", irflags, dsr1, dsr2, lsr, der);
432
433 /* D error -> read DER and DSR2 bit 2 */
434 if (der || (dsr2 & 4)) {
435
436 if (cs->debug & L1_DEB_WARN)
437 debugl1(cs, "Amd7930: interrupt: D error DER=0x%04X", der);
438
439 /* RX, TX abort if collision detected */
440 if (der & 2) {
441 wByteAMD(cs, 0x21, 0xC2);
442 wByteAMD(cs, 0x21, 0x02);
443 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
444 del_timer(&cs->dbusytimer);
445 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
446 schedule_event(cs, D_CLEARBUSY);
447 /* restart frame */
448 if (cs->tx_skb) {
449 skb_push(cs->tx_skb, cs->tx_cnt);
450 cs->tx_cnt = 0;
451 cs->dc.amd7930.tx_xmtlen = 0;
452 Amd7930_fill_Dfifo(cs);
453 } else {
454 printk(KERN_WARNING "HiSax: Amd7930 D-Collision, no skb\n");
455 debugl1(cs, "Amd7930: interrupt: D-Collision, no skb");
456 }
457 }
458 /* remove damaged data from fifo */
459 Amd7930_empty_Dfifo(cs, 1);
460
461 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
462 del_timer(&cs->dbusytimer);
463 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
464 schedule_event(cs, D_CLEARBUSY);
465 /* restart TX-Frame */
466 if (cs->tx_skb) {
467 skb_push(cs->tx_skb, cs->tx_cnt);
468 cs->tx_cnt = 0;
469 cs->dc.amd7930.tx_xmtlen = 0;
470 Amd7930_fill_Dfifo(cs);
471 }
472 }
473
474 /* D TX FIFO empty -> fill */
475 if (irflags & 1) {
476 if (cs->debug & L1_DEB_ISAC)
477 debugl1(cs, "Amd7930: interrupt: clear Timer and fill D-TX-FIFO if data");
478
479 /* AMD interrupts off */
480 AmdIrqOff(cs);
481
482 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
483 del_timer(&cs->dbusytimer);
484 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
485 schedule_event(cs, D_CLEARBUSY);
486 if (cs->tx_skb) {
487 if (cs->tx_skb->len)
488 Amd7930_fill_Dfifo(cs);
489 }
490 /* AMD interrupts on */
491 AmdIrqOn(cs);
492 }
493
494
495 /* D RX FIFO full or tiny packet in Fifo -> empty */
496 if ((irflags & 2) || (dsr1 & 2)) {
497 if (cs->debug & L1_DEB_ISAC)
498 debugl1(cs, "Amd7930: interrupt: empty D-FIFO");
499 Amd7930_empty_Dfifo(cs, 0);
500 }
501
502
503 /* D-Frame transmit complete */
504 if (dsr1 & 64) {
505 if (cs->debug & L1_DEB_ISAC) {
506 debugl1(cs, "Amd7930: interrupt: transmit packet ready");
507 }
508 /* AMD interrupts off */
509 AmdIrqOff(cs);
510
511 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
512 del_timer(&cs->dbusytimer);
513 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
514 schedule_event(cs, D_CLEARBUSY);
515
516 if (cs->tx_skb) {
517 if (cs->debug & L1_DEB_ISAC)
518 debugl1(cs, "Amd7930: interrupt: TX-Packet ready, freeing skb");
519 dev_kfree_skb_irq(cs->tx_skb);
520 cs->tx_cnt = 0;
521 cs->dc.amd7930.tx_xmtlen = 0;
522 cs->tx_skb = NULL;
523 }
524 if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
525 if (cs->debug & L1_DEB_ISAC)
526 debugl1(cs, "Amd7930: interrupt: TX-Packet ready, next packet dequeued");
527 cs->tx_cnt = 0;
528 cs->dc.amd7930.tx_xmtlen = 0;
529 Amd7930_fill_Dfifo(cs);
530 }
531 else
532 schedule_event(cs, D_XMTBUFREADY);
533 /* AMD interrupts on */
534 AmdIrqOn(cs);
535 }
536
537 /* LIU status interrupt -> read LSR, check statechanges */
538 if (lsr & 0x38) {
539 /* AMD interrupts off */
540 AmdIrqOff(cs);
541
542 if (cs->debug & L1_DEB_ISAC)
543 debugl1(cs, "Amd: interrupt: LSR=0x%02X, LIU is in state %d", lsr, ((lsr & 0x7) + 2));
544
545 cs->dc.amd7930.ph_state = (lsr & 0x7) + 2;
546
547 schedule_event(cs, D_L1STATECHANGE);
548 /* AMD interrupts on */
549 AmdIrqOn(cs);
550 }
551
552 /* reads Interrupt-Register again. If there is a new interrupt-flag: restart handler */
553 irflags = rByteAMD(cs, 0x00);
554 }
555
556 }
557
558 static void
Amd7930_l1hw(struct PStack * st,int pr,void * arg)559 Amd7930_l1hw(struct PStack *st, int pr, void *arg)
560 {
561 struct IsdnCardState *cs = (struct IsdnCardState *) st->l1.hardware;
562 struct sk_buff *skb = arg;
563 u_long flags;
564
565 if (cs->debug & L1_DEB_ISAC)
566 debugl1(cs, "Amd7930: l1hw called, pr: 0x%04X", pr);
567
568 switch (pr) {
569 case (PH_DATA | REQUEST):
570 if (cs->debug & DEB_DLOG_HEX)
571 LogFrame(cs, skb->data, skb->len);
572 if (cs->debug & DEB_DLOG_VERBOSE)
573 dlogframe(cs, skb, 0);
574 spin_lock_irqsave(&cs->lock, flags);
575 if (cs->tx_skb) {
576 skb_queue_tail(&cs->sq, skb);
577 #ifdef L2FRAME_DEBUG /* psa */
578 if (cs->debug & L1_DEB_LAPD)
579 Logl2Frame(cs, skb, "Amd7930: l1hw: PH_DATA Queued", 0);
580 #endif
581 } else {
582 cs->tx_skb = skb;
583 cs->tx_cnt = 0;
584 cs->dc.amd7930.tx_xmtlen = 0;
585 #ifdef L2FRAME_DEBUG /* psa */
586 if (cs->debug & L1_DEB_LAPD)
587 Logl2Frame(cs, skb, "Amd7930: l1hw: PH_DATA", 0);
588 #endif
589 Amd7930_fill_Dfifo(cs);
590 }
591 spin_unlock_irqrestore(&cs->lock, flags);
592 break;
593 case (PH_PULL | INDICATION):
594 spin_lock_irqsave(&cs->lock, flags);
595 if (cs->tx_skb) {
596 if (cs->debug & L1_DEB_WARN)
597 debugl1(cs, "Amd7930: l1hw: l2l1 tx_skb exist this shouldn't happen");
598 skb_queue_tail(&cs->sq, skb);
599 spin_unlock_irqrestore(&cs->lock, flags);
600 break;
601 }
602 if (cs->debug & DEB_DLOG_HEX)
603 LogFrame(cs, skb->data, skb->len);
604 if (cs->debug & DEB_DLOG_VERBOSE)
605 dlogframe(cs, skb, 0);
606 cs->tx_skb = skb;
607 cs->tx_cnt = 0;
608 cs->dc.amd7930.tx_xmtlen = 0;
609 #ifdef L2FRAME_DEBUG /* psa */
610 if (cs->debug & L1_DEB_LAPD)
611 Logl2Frame(cs, skb, "Amd7930: l1hw: PH_DATA_PULLED", 0);
612 #endif
613 Amd7930_fill_Dfifo(cs);
614 spin_unlock_irqrestore(&cs->lock, flags);
615 break;
616 case (PH_PULL | REQUEST):
617 #ifdef L2FRAME_DEBUG /* psa */
618 if (cs->debug & L1_DEB_LAPD)
619 debugl1(cs, "Amd7930: l1hw: -> PH_REQUEST_PULL, skb: %s", (cs->tx_skb) ? "yes" : "no");
620 #endif
621 if (!cs->tx_skb) {
622 test_and_clear_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
623 st->l1.l1l2(st, PH_PULL | CONFIRM, NULL);
624 } else
625 test_and_set_bit(FLG_L1_PULL_REQ, &st->l1.Flags);
626 break;
627 case (HW_RESET | REQUEST):
628 spin_lock_irqsave(&cs->lock, flags);
629 if ((cs->dc.amd7930.ph_state == 8)) {
630 /* b-channels off, PH-AR cleared
631 * change to F3 */
632 Amd7930_ph_command(cs, 0x20, "HW_RESET REQUEST"); //LMR1 bit 5
633 spin_unlock_irqrestore(&cs->lock, flags);
634 } else {
635 Amd7930_ph_command(cs, 0x40, "HW_RESET REQUEST");
636 cs->dc.amd7930.ph_state = 2;
637 spin_unlock_irqrestore(&cs->lock, flags);
638 Amd7930_new_ph(cs);
639 }
640 break;
641 case (HW_ENABLE | REQUEST):
642 cs->dc.amd7930.ph_state = 9;
643 Amd7930_new_ph(cs);
644 break;
645 case (HW_INFO3 | REQUEST):
646 // automatic
647 break;
648 case (HW_TESTLOOP | REQUEST):
649 /* not implemented yet */
650 break;
651 case (HW_DEACTIVATE | RESPONSE):
652 skb_queue_purge(&cs->rq);
653 skb_queue_purge(&cs->sq);
654 if (cs->tx_skb) {
655 dev_kfree_skb(cs->tx_skb);
656 cs->tx_skb = NULL;
657 }
658 if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
659 del_timer(&cs->dbusytimer);
660 if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
661 schedule_event(cs, D_CLEARBUSY);
662 break;
663 default:
664 if (cs->debug & L1_DEB_WARN)
665 debugl1(cs, "Amd7930: l1hw: unknown %04x", pr);
666 break;
667 }
668 }
669
670 static void
setstack_Amd7930(struct PStack * st,struct IsdnCardState * cs)671 setstack_Amd7930(struct PStack *st, struct IsdnCardState *cs)
672 {
673
674 if (cs->debug & L1_DEB_ISAC)
675 debugl1(cs, "Amd7930: setstack called");
676
677 st->l1.l1hw = Amd7930_l1hw;
678 }
679
680
681 static void
DC_Close_Amd7930(struct IsdnCardState * cs)682 DC_Close_Amd7930(struct IsdnCardState *cs) {
683 if (cs->debug & L1_DEB_ISAC)
684 debugl1(cs, "Amd7930: DC_Close called");
685 }
686
687
688 static void
dbusy_timer_handler(struct IsdnCardState * cs)689 dbusy_timer_handler(struct IsdnCardState *cs)
690 {
691 u_long flags;
692 struct PStack *stptr;
693 WORD dtcr, der;
694 BYTE dsr1, dsr2;
695
696
697 if (cs->debug & L1_DEB_ISAC)
698 debugl1(cs, "Amd7930: dbusy_timer expired!");
699
700 if (test_bit(FLG_DBUSY_TIMER, &cs->HW_Flags)) {
701 spin_lock_irqsave(&cs->lock, flags);
702 /* D Transmit Byte Count Register:
703 * Counts down packet's number of Bytes, 0 if packet ready */
704 dtcr = rWordAMD(cs, 0x85);
705 dsr1 = rByteAMD(cs, 0x02);
706 dsr2 = rByteAMD(cs, 0x07);
707 der = rWordAMD(cs, 0x03);
708
709 if (cs->debug & L1_DEB_ISAC)
710 debugl1(cs, "Amd7930: dbusy_timer_handler: DSR1=0x%02X, DSR2=0x%02X, DER=0x%04X, cs->tx_skb->len=%u, tx_stat=%u, dtcr=%u, cs->tx_cnt=%u", dsr1, dsr2, der, cs->tx_skb->len, cs->dc.amd7930.tx_xmtlen, dtcr, cs->tx_cnt);
711
712 if ((cs->dc.amd7930.tx_xmtlen - dtcr) < cs->tx_cnt) { /* D-Channel Busy */
713 test_and_set_bit(FLG_L1_DBUSY, &cs->HW_Flags);
714 stptr = cs->stlist;
715 spin_unlock_irqrestore(&cs->lock, flags);
716 while (stptr != NULL) {
717 stptr->l1.l1l2(stptr, PH_PAUSE | INDICATION, NULL);
718 stptr = stptr->next;
719 }
720
721 } else {
722 /* discard frame; reset transceiver */
723 test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags);
724 if (cs->tx_skb) {
725 dev_kfree_skb_any(cs->tx_skb);
726 cs->tx_cnt = 0;
727 cs->tx_skb = NULL;
728 cs->dc.amd7930.tx_xmtlen = 0;
729 } else {
730 printk(KERN_WARNING "HiSax: Amd7930: D-Channel Busy no skb\n");
731 debugl1(cs, "Amd7930: D-Channel Busy no skb");
732
733 }
734 /* Transmitter reset, abort transmit */
735 wByteAMD(cs, 0x21, 0x82);
736 wByteAMD(cs, 0x21, 0x02);
737 spin_unlock_irqrestore(&cs->lock, flags);
738 cs->irq_func(cs->irq, cs);
739
740 if (cs->debug & L1_DEB_ISAC)
741 debugl1(cs, "Amd7930: dbusy_timer_handler: Transmitter reset");
742 }
743 }
744 }
745
746
747
Amd7930_init(struct IsdnCardState * cs)748 void Amd7930_init(struct IsdnCardState *cs)
749 {
750 WORD *ptr;
751 BYTE cmd, cnt;
752
753 if (cs->debug & L1_DEB_ISAC)
754 debugl1(cs, "Amd7930: initamd called");
755
756 cs->dc.amd7930.tx_xmtlen = 0;
757 cs->dc.amd7930.old_state = 0;
758 cs->dc.amd7930.lmr1 = 0x40;
759 cs->dc.amd7930.ph_command = Amd7930_ph_command;
760 cs->setstack_d = setstack_Amd7930;
761 cs->DC_Close = DC_Close_Amd7930;
762
763 /* AMD Initialisation */
764 for (ptr = initAMD; *ptr != 0xFFFF; ) {
765 cmd = LOBYTE(*ptr);
766
767 /* read */
768 if (*ptr++ >= 0x100) {
769 if (cmd < 8)
770 /* reset register */
771 rByteAMD(cs, cmd);
772 else {
773 wByteAMD(cs, 0x00, cmd);
774 for (cnt = *ptr++; cnt > 0; cnt--)
775 rByteAMD(cs, 0x01);
776 }
777 }
778 /* write */
779 else if (cmd < 8)
780 wByteAMD(cs, cmd, LOBYTE(*ptr++));
781
782 else {
783 wByteAMD(cs, 0x00, cmd);
784 for (cnt = *ptr++; cnt > 0; cnt--)
785 wByteAMD(cs, 0x01, LOBYTE(*ptr++));
786 }
787 }
788 }
789
setup_Amd7930(struct IsdnCardState * cs)790 void setup_Amd7930(struct IsdnCardState *cs)
791 {
792 INIT_WORK(&cs->tqueue, Amd7930_bh);
793 setup_timer(&cs->dbusytimer, (void *)dbusy_timer_handler, (long)cs);
794 }
795